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1. 发明专利

JP2001160641A SUPER-FLUORESCENT LIGHT SOURCE 失效
公开(公告)号：JP2001160641A
公开(公告)日：2001-06-12
申请号：JP2000281652
申请日：2000-09-18
申请人： UNIV LELAND STANFORD JUNIOR
发明人： DIGONNET MICHEL J F , FALQUIER DARIO G
IPC分类号： G01C19/72 , H01S3/06 , H01S3/067 , H01S3/10
摘要： PROBLEM TO BE SOLVED: To reduce a polarization-dependent gain(PDG) induced by a polarized pump light by controlling the wavelength stability of a super-fluorescent light source by optical constitution. SOLUTION: In one device and method, a Faraday rotator mirror is used for the edge of the waveguide of the super-fluorescent light source. In another device and method, the birefringence of the waveguide is used with the Faraday rotator mirror so that the influence of the PDG on the mean wavelength difference between the spectrum outputs of the orthogonal polarization components can be further averaged.

2. 发明专利

JPH10135550A FIBER OPTICAL AMPLIFIER SYSTEM AND OPTICAL SIGNAL AMPLIFYING METHOD 失效
公开(公告)号：JPH10135550A
公开(公告)日：1998-05-22
申请号：JP20474497
申请日：1997-07-30
申请人： UNIV LELAND STANFORD JUNIOR
发明人： SHAW HERBERT J , DIGONNET MICHEL J F
IPC分类号： G02B6/00 , G02B6/26 , G02B6/28 , G02F1/17 , G02F1/313 , G02F1/35 , H01S3/06 , H01S3/067 , H01S3/07 , H01S3/091 , H01S3/0933 , H01S3/094 , H01S3/10 , H01S3/23 , H03F3/08 , H03F3/18 , H04B10/17
摘要： PROBLEM TO BE SOLVED: To provide a fiber optical amplifier system whose structure is highly simplified. SOLUTION: This fiber optical amplifier system is provided with a lasing fiber, a pump light source 42 with which the lasing fiber is pumped, and a light coupler having the coupling efficiency which depends on wavelength. This light coupler contains an optical fiber port for signal which transmits the signal to be amplified, an optical fiber port for pump light which transmits the pump light, and an optical fiber port for signal and pump light. This optical fiber port for signal and pump light, is optically coupled to one end of the lasing fiber. The signal to be amplified is transmitted between the above-mentioned optical coupler and the lasing fiber, and an inversion distribution is generated in a lasing substance by transmitting the pump light to the lasing substance contained in the lasing fiber. As a result, signal is amplified by induction radiation when the signal passes through the lasing fiber.

3. 发明专利

JP2000004058A FIBER OPTICAL AMPLIFIER AND AMPLIFYING METHOD OF OPTICAL SIGNAL 失效
公开(公告)号：JP2000004058A
公开(公告)日：2000-01-07
申请号：JP16180899
申请日：1999-06-09
申请人： UNIV LELAND STANFORD JUNIOR
发明人： SHAW HERBERT J , DIGONNET MICHEL J F
IPC分类号： G02B6/00 , G02B6/26 , G02B6/28 , G02F1/17 , G02F1/313 , G02F1/35 , H01S3/06 , H01S3/067 , H01S3/07 , H01S3/091 , H01S3/0933 , H01S3/094 , H01S3/10 , H01S3/23 , H03F3/08 , H03F3/18 , H04B10/17
摘要： PROBLEM TO BE SOLVED: To inject a signal using an identical multiplication coupler by pumping a lasing material and causing an inversion distribution in a doped material so that a signal is amplified by induction radiation in passing through the doped material thereby realizing symmetrical bi-directional amplification. SOLUTION: A pumping illumination source 42 is coupled with the fiber 12a of a coupler and provides the port A of a multiplication coupler with pumping illumination. A signal to be amplified is coupled with one end of a fiber 12b at port C of the coupler. Pumping illumination from the light source 42 and the signal to be amplified are coupled at port D of the coupler through amplifying function of the coupler. The pair of signal wavelengths are delivered to an ND:YAG crystal 44 to be coupled with the fiber 12b. A signal input at port C is amplified in the ND:YAG crystal 44 and coupled with an optical fiber 46 before being transmitted through an optical fiber system.

4. 发明专利

JPH10144981A FIBER OPTICAL AMPLIFIER SYSTEM AND METHOD FOR AMPLIFYING LIGHT SIGNAL 失效
公开(公告)号：JPH10144981A
公开(公告)日：1998-05-29
申请号：JP20474397
申请日：1997-07-30
申请人： UNIV LELAND STANFORD JUNIOR
发明人： SHAW HERBERT J , DIGONNET MICHEL J F
IPC分类号： G02B6/00 , G02B6/26 , G02B6/28 , G02F1/17 , G02F1/313 , G02F1/35 , H01S3/06 , H01S3/067 , H01S3/07 , H01S3/091 , H01S3/0933 , H01S3/094 , H01S3/10 , H01S3/23 , H03F3/08 , H03F3/18 , H04B10/17
摘要： PROBLEM TO BE SOLVED: To provide a fiber optical amplifier system whose structure is highly simplified. SOLUTION: A fiber optical amplifier system has a lasing fiber 44, a pump light source 42 for pumping the lasing fiber 44, and photocouplers 10a and 10b with a coupling efficiency, depending on the wavelength. The photocouplers 10a and 10b include an optical fiber port for signal that transmits a signal to be amplified, an optical fiber port for pump light that transmits pump light, and an optical fiber port commonly for signal and pump light. The optical fiber port used commonly for the signal and pump signal is coupled optically to one terminal of the lasing fiber 44, transmits a signal to be amplified between the photocouplers 10a and 10b and the lasing fiber 44. At the same time, the port transmits pump light to a lasing substance in the lasing fiber 44 and causes an population inversion in the lasing substance, thus amplifying a signal owing to induced radiation when it passes through the lasing fiber 44.

5. 发明专利

JP2000081644A DEVICE FOR EXECUTING ALL OPTICAL SWITCHING OF LIGHT SIGNAL, METHOD FOR CHANGING OVER LIGHT SIGNAL BY USING LIGHT PUMP MD METHOD FOR USING SAGNAC INTERFEROMETER LOOP AS OPTICAL SWITCH 失效
公开(公告)号：JP2000081644A
公开(公告)日：2000-03-21
申请号：JP21545399
申请日：1999-07-29
申请人： UNIV LELAND STANFORD JUNIOR
发明人： DAVIS MONICA K , DIGONNET MICHEL J F
IPC分类号： G01B9/02 , G02B6/26 , G02F1/35
摘要： PROBLEM TO BE SOLVED: To make even a long waveguide stable to a slow environmental disturbance, such as a temp. change, over the length of an arbitrary wavelength by using a Sagnac switch architecture. SOLUTION: When the pulp pulses from a pump source 420 are impressed via a second wavelength division coupler 422, different phase shifts are generated in two oppositely propagating light signals. This generation occurs in the influence of the pump signal on an active fiber 416 and the asymmetric positioning of the active fiber 416. When the differential phase shifts are ±π or odd times ±π(namely, the phase shifts of ±(2n+1)π when n=0, 1, 2,...) are assumed and the two signals interfere to weaken each other at a port A of a coupler 414 and interfere to intensify each other at a port B of the coupler 414. The output fiber 450 (port 4) couples the output signals from the port B of the coupler 414 as the changed over output signals.

6. 发明专利

JPH1065248A ULTRAFLUORESCENT LIGHT SOURCE, OPTICAL WAVEGUIDE USED AS ULTRAFLUORESCENT LIGHT SOURCE, OPTICAL APPARATUS, AND UNIDIRECTIONAL ULTRAFLUORESCENT LIGHT SOURCE 失效
公开(公告)号：JPH1065248A
公开(公告)日：1998-03-06
申请号：JP11952497
申请日：1997-05-09
申请人： UNIV LELAND STANFORD JUNIOR
发明人： DIGONNET MICHEL J F , FALQUIER DARIO G , WAGENER JEFFERSON L , SHAW H JOHN
IPC分类号： H01S3/10 , H01S3/06 , H01S3/067
摘要： PROBLEM TO BE SOLVED: To practically increase emission of preferred polarized light from one of first or second end of a waveguide by disposing a polarizer at a specified position along a fiber. SOLUTION: A fiber 200 includes a polarizer 240. Optical power of one polarized light is reduced, when the polarizer 240 is disposed at a fixed position along the fiber 200. Position of the polarizer 240 along the fiber 200 has conspicuous effect on the output signal from the fiber 200 to cause polarization thereof. When the polarizer 240 is positioned along the fiber 200, the optical output intensity is substantially doubled along with the uneliminated polarization mode. Consequently, an intensively polarized output signal is applied to an end 230 of the fiber 200 and the power (i.e., intensity) can be doubled as compared with original one. According to the arrangement, emission of preferred polarized light from one of first or second end of a waveguide can be increased practically.

7. 发明授权

US4859016B1 Fiber optic amplifier 失效
标题翻译：光纤放大器
公开(公告)号：US4859016B1
公开(公告)日：2000-11-07
申请号：US13787087
申请日：1987-12-22
申请人： UNIV LELAND STANFORD JUNIOR
发明人： SHAW HERBERT J , DIGONNET MICHEL J F
IPC分类号： H01S3/067 , H01S3/0933 , H01S3/094 , H04B10/17 , H04J14/02 , G02B6/26
CPC分类号： H04B10/2912 , H01S3/06787 , H01S3/0933 , H01S3/094003 , H01S3/094011 , H04B10/291 , H04J14/02

8. 发明申请

WO0109991A3 GAIN FLATTENING WITH NONLINEAR SAGNAC AMPLIFIERS 审中-公开
标题翻译：增益与非线性SAGNAC放大器
公开(公告)号：WO0109991A3
公开(公告)日：2001-08-16
申请号：PCT/US0018953
申请日：2000-07-12
申请人： UNIV LELAND STANFORD JUNIOR
发明人： VAKOC BENJAMIN A , DIGONNET MICHEL J F
IPC分类号： G02F1/365 , G02F1/35 , H01S3/06 , H01S3/067 , H01S3/10 , H01S3/13 , H01S3/23 , H04B10/16 , H04B10/17 , H01S3/131
CPC分类号： H04B10/294 , G02F1/3519 , H01S3/06754 , H01S3/1302 , H01S2301/04 , H01S2301/06 , H04B10/2935
摘要： An apparatus and a method provide gain flattening in communications systems wherein a large number of optical signals at different wavelengths must be amplified while maintaining signal power within an acceptable range. Because of differences in gain of typical optical amplifiers as a function of wavelength and input power, the signals at different wavelengths are not amplified by the same amounts. Thus, when amplified multiple times, certain signals tend to become severely attenuated to the point of being no longer useable. The present gain flattening apparatus and method cause signals having higher gain-power products to be attenuated by a greater amount in response to Kerr-induced phase shifting such that after multiple stages of amplification, all the signal powers converge toward a small range of acceptable output powers. The apparatus provides amplification, multiple times, of a series of signals with a plurality of wavelengths covering a very wide spectral range, while maintaining the power of all the signals within a small range. The spread of this signal power range is robust against changes in the signal power, against changes in the number of signals, and, to some degree, against changes in the amplifier's pump power. The apparatus design is also robust against manufacturing changes in the parameters of the apparatus' components. The apparatus and invention are preferably implemented as multiple nonlinear Sagnac amplifiers having erbium-doped fiber amplifiers positioned asymmetrically in an interferometer loop.
摘要翻译：一种装置和方法在通信系统中提供增益平坦化，其中必须放大不同波长的大量光信号，同时将信号功率保持在可接受的范围内。由于作为波长和输入功率的函数的典型光放大器的增益差异，不同波长的信号不会被放大相同的量。因此，当多次放大时，某些信号倾向于变得严重衰减到不能再使用的程度。本增益平坦化装置和方法使得具有较高增益功率乘积的信号响应于克尔感应相移而被衰减更大的量，使得在多级放大之后，所有的信号功率向着可接受的输出的小范围收敛权力。该装置提供多个具有覆盖非常宽的光谱范围的多个波长的一系列信号的放大倍数，同时将所有信号的功率保持在小范围内。该信号功率范围的扩展对于信号功率的变化，对于信号数量的变化以及在一定程度上对放大器的泵功率的变化是稳健的。该设备设计对于设备组件的参数的制造变化也是鲁棒的。该装置和发明优选地被实现为具有在干涉仪环路中不对称地布置的掺铒光纤放大器的多个非线性Sagnac放大器。

9. 发明申请

WO2011115933A3 OPTICAL-FIBER-COMPATIBLE ACOUSTIC SENSOR 审中-公开
标题翻译：光纤兼容声学传感器
公开(公告)号：WO2011115933A3
公开(公告)日：2013-01-10
申请号：PCT/US2011028407
申请日：2011-03-14
申请人： UNIV LELAND STANFORD JUNIOR
发明人： AKKAYA ONUR CAN , DIGONNET MICHEL J F , KILIC ONUR , KINO GORDON S , SOLGAARD OLAV
IPC分类号： G01H9/00
CPC分类号： G01H9/004 , G02B6/262 , G02B6/32 , G02B2006/12138 , Y10T29/49826
摘要： An acoustic sensor (10) includes a diaphragm (20) having a reflective element. The sensor has an optical fiber (30) positioned relative to the reflective element such that light emitted from the optical fiber is reflected by the reflective clement. A first end of the optical fiber and the reflective element form an optical cavity (40) therebetween. The acoustic sensor further includes a structural element mechanically coupled to the diaphragm and the optical fiber. The structural element includes a material having a coefficient of thermal expansion substantially similar to the coefficient of thermal expansion of the optical fiber. For example, the material can be silica.
摘要翻译：声学传感器（10）包括具有反射元件的隔膜（20）。传感器具有相对于反射元件定位的光纤（30），使得从光纤发射的光被反射元件反射。光纤和反射元件的第一端在其间形成光腔（40）。声学传感器还包括机械耦合到隔膜和光纤的结构元件。结构元件包括具有基本上类似于光纤的热膨胀系数的热膨胀系数的材料。例如，该材料可以是二氧化硅。

10. 发明申请

WO2006119200A3 HIGH-SENSITIVITY FIBER-COMPATIBLE OPTICAL ACOUSTIC SENSOR 审中-公开
标题翻译：高灵敏度光纤兼容光学声学传感器
公开(公告)号：WO2006119200A3
公开(公告)日：2006-12-21
申请号：PCT/US2006016650
申请日：2006-04-28
申请人： UNIV LELAND STANFORD JUNIOR , KILIC ONUR , KIM SORA , SOLGAARD OLAV , DIGONNET MICHEL J F , KINO GORDON S
发明人： KILIC ONUR , KIM SORA , SOLGAARD OLAV , DIGONNET MICHEL J F , KINO GORDON S
IPC分类号： G01H9/00
CPC分类号： G01H9/00 , G01H9/004
摘要： An acoustic sensor includes at least one photonic crystal structure having at least one optical resonance with a resonance frequency and a resonance lineshape. The acoustic sensor further includes a housing substantially surrounding the at least one photonic crystal structure and mechanically coupled to the at least one photonic crystal structure. At least one of the resonance frequency and the resonance lineshape is responsive to acoustic waves incident upon the housing.
摘要翻译：声传感器包括至少一个光子晶体结构，其具有至少一个具有谐振频率和谐振线形的光学谐振。声学传感器还包括基本上围绕至少一个光子晶体结构并机械耦合到至少一个光子晶体结构的壳体。谐振频率和谐振线形形状中的至少一个对入射在壳体上的声波有反应。

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